package com.qingcheng.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.qingcheng.service.goods.SkuSearchService;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.collect.HppcMaps;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.MatchQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class SkuSearchServiceImpl implements SkuSearchService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;


    public Map search(Map<String, String> searchMap)throws Exception {
        SearchRequest searchRequest =new SearchRequest("sku");
        searchRequest.types("doc");

        //条件
        SearchSourceBuilder searchSourceBuilder=new SearchSourceBuilder();
        BoolQueryBuilder boolQueryBuilder =QueryBuilders.boolQuery();
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("name",searchMap.get("keywords"));

        //分类信息
        if(searchMap.get("category")!=null){
            TermQueryBuilder termQueryBuilder =QueryBuilders.termQuery("categoryName",searchMap.get("category"));
        }

        boolQueryBuilder.must(matchQueryBuilder);
        searchSourceBuilder.query(boolQueryBuilder);

        //分类聚合  sku_category 自定义   categoryName要分类的字段
        TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("sku_category").field("categoryName");
        searchSourceBuilder.aggregation(termsAggregationBuilder);

        //分页查询1
        if(searchMap.get("pageNo")==null){
            searchMap.put("pageNo","1");
        }
        Integer pageNo =  Integer.parseInt( searchMap.get("pageNo") );
        Integer size = 10;
        Integer from =(pageNo-1)*size; //计算分页公式
        searchSourceBuilder.from(from);
        searchSourceBuilder.size(size);

        //排序
        String sort = searchMap.get("sort");
        String sortOrder = searchMap.get("sortOrder");
        if(!"".equals(sort)){
            searchSourceBuilder.sort(sort, SortOrder.valueOf(sortOrder));
            //searchSourceBuilder.sort("price", SortOrder.DESC);
        }

        //高亮查询
        HighlightBuilder highlightBuilder =new HighlightBuilder();
        highlightBuilder.field("name").preTags("<font style='color:red'>").postTags("</font>");
        searchSourceBuilder.highlighter(highlightBuilder);

        searchRequest.source(searchSourceBuilder);
        SearchResponse response = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        //分装结果
        Map resultMap = new HashMap();
        SearchHits hitssearchHits = response.getHits();

        SearchHit[] hits = hitssearchHits.getHits();
        List<Map<String, Object>> resultList = new ArrayList<Map<String, Object>>();
        for(SearchHit hit:hits){
            Map<String, Object> map = hit.getSourceAsMap();


            //name高亮处理
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();
            HighlightField name = highlightFields.get("name");
            Text[] fragments = name.fragments();
            map.put("name",fragments[0].toString());//用高亮的内容替换原内容

            resultList.add(map);
        }
        resultMap.put("rows",resultList);

        //2.2 商品分类列表
        Aggregations aggregations = response.getAggregations();
        Map<String, Aggregation> aggregationMap = aggregations.getAsMap();
        Terms terms = (Terms) aggregationMap.get("sku_category");

        List<? extends Terms.Bucket> buckets =  terms.getBuckets();
        List<String> categoryList=new ArrayList();
        for( Terms.Bucket bucket:buckets ){
            categoryList.add(bucket.getKeyAsString());
        }
        resultMap.put("categoryList",categoryList);

        //分页结果封装
        long totalHits = hitssearchHits.getTotalHits();
        long totalPages = (totalHits%size==0)? totalHits/size:totalHits/size+1;
        resultMap.put("totalPages",totalPages);

        return resultMap;
    }
}
